Originally Posted by JSensei

It's worth noting that if you want to save them all and burn them at the end, you still can. Just leave them in your present box. They will not be added to your account until you accept them. It's a pain, but it'll work.

As much as I'd love to do that, many of my raw pudding/peronamin comes (at least for this event) from unlocked attache cases, which I have no way of knowing what I got until they're already in my inventory. Nonetheless, I do think otherwise that it's a good idea to consider.